183 results on '"The Kloe Collaboration"'
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152. Measurement of the Branching Ratio of the KL -> pi+pi- decay with the KLOE Detector
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KLOE collaboration and KLOE collaboration
- Abstract
We present a measurement of the branching ratio of the CP violating decay KL->pi+pi- performed by the KLOE experiment at the phi factory DAFNE. We use 328 pb-1 of data collected in 2001 and 2002, corresponding to ~ 150 million tagged KL mesons. We find BR(KL->pi+pi-) = $(1.963 +/- 0.012 +/- 0.017)x 10^-3. This branching ratio measurement is fully inclusive of final-state radiation. Using the above result, we determine the modulus of the amplitude ratio |\eta_{+-}| to be (2.219 +/- 0.013)x 10^{-3} and |\epsilon| to be (2.216 +/- 0.013)x 10^{-3}., Comment: Subitted to Phys. Lett. B
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- 2006
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153. Measurement of the DA$\Phi$NE luminosity with the KLOE detector using large angle Bhabha scattering
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KLOE Collaboration and KLOE Collaboration
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We describe the method of measuring the integrated luminosity of the $e^+e^-$ collider DA$\Phi$NE, the Frascati $\phi-$factory. The measurement is done with the KLOE detector selecting large angle Bhabha scattering events and normalizing them to the effective cross section. The $e^+e^- \to e^+e^-(\gamma)$ cross section is calculated using different event generators which account for the $O(\alpha)$ radiative initial and final state corrections, and the $\phi$ resonance contribution. The accuracy of the measurement is 0.6%, where 0.3% comes from systematic errors related to the event counting and 0.5% from theoretical evaluations of the cross section., Comment: Submitted to Eur. Phys. J. C
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- 2006
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154. First observation of quantum interference in the process phi -> KS KL ->pi+pi-pi+pi-: a test of quantum mechanics and CPT symmetry
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KLOE collaboration and KLOE collaboration
- Abstract
We present the first observation of quantum interference in the process phi -> KS KL ->pi+pi-pi+pi-. This analysis is based on data collected with the KLOE detector at the e^+e^- collider DAFNE in 2001--2002 for an integrated luminosity of about 380pb^-1. Fits to the distribution of Delta t, the difference between the two kaon decay times, allow tests of the validity of quantum mechanics and CPT symmetry. No deviations from the expectations of quantum mechanics and CPT symmetry have been observed. New or improved limits on various decoherence and CPT violation parameters have been obtained, Comment: submitted to Physics Letter B one number changed old:gamma=(1.1+2.9-2.4)10^-21 GeV new:(1.3+2.8-2.4)10^-21GeV corrected typos
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- 2006
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155. Measurement of the Absolute Branching Ratio for the K+ -> mu+ nu(gamma) Decay with the KLOE Detector
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KLOE Collaboration and KLOE Collaboration
- Abstract
We have measured the fully inclusive K+ -> mu+nu(gamma) absolute branching ratio with the KLOE experiment at DAFNE, the Frascati Phi-factory. From some 865,283 K+ -> mu+nu(gamma) decays obtained from a sample of about 5.2x10^8 Phi-meson decays, we find BR(K+ -> mu+ nu (gamma)) = 0.6366 +-0.0009(stat.) +-0.0015(syst.), corresponding to an overall fractional error of 0.27%. Using recent lattice results on the decay constants of pseudoscalar mesons one can obtain an estimate for the CKM mixing matrix element |Vus|=0.2223+-0.0026., Comment: Corrected typos
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- 2005
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156. Study of the decay phi--> f0(980)g --> pi+pi-g with the KLOE detector
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KLOE collaboration and KLOE collaboration
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We measured, with the KLOE detector, the spectrum of pi+pi- invariant mass in a sample of 6.7 x 10^5 e+e- --> pi+pi-g events with the photon at large polar angle (theta_g>45^o) at a centre of mass energy sqrt(s) around the phi mass. We observe a clear contribution from the intermediate process phi --> f0(980)g. A sizeable effect is also observed in the distribution of the forward-backeard asymmetry. We use different theoretical models to fit the spectrum and we determine the f_0 mass and coupling constants to the phi, to pi+pi- and to KK., Comment: 15 pages, 6 figures, submitted to Phys.Lett.B
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- 2005
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157. KLOE results on f0(980), a0(980) scalars and eta decays
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KLOE Collaboration and KLOE Collaboration
- Abstract
The KLOE experiment running at the phi-factory DAPHNE has collected ~ 450 pb^(-1) in the 2001--2002 data taking. We report preliminary results on light meson spectroscopy based on this data sample; particles are all produced through phi radiative decays. The nature of f0(980) and a0(980) is investigated by studying the shape of the resulting mass spectra, which is sensitive to their structure. A detailed study of the eta --> pi pi pi dynamics through a Dalitz plot analysis gives the possibility to extract information on the quark mass difference. Finally, the branching ratio for the eta --> pi0 gamma gamma decay is compared with previous measurements and with the expectations from Chiral Perturbation Theory., Comment: 4 pages, 2 figures, proceedings of "Rencontres de Moriond 2005 - QCD and hadronic interactions"
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- 2005
158. $|V_{us}|$ and $K_S$ Decays from Kloe
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The KLOE Collaboration and The KLOE Collaboration
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Recent results obtained by the KLOE experiment operating at DA$\Phi$NE, the Frascati $\phi$-factory, are presented. They mainly concern neutral kaon decays including the $K_L$ dominant branching ratios, the $K_L$ lifetime and the extraction of the $CKM$ parameter $V_{us}$ from the $K_L$ semileptonic decays and lifetime. The best world upper limit on $K_S \to \pppo$ channel is also presented, Comment: 9 pages, 6 figures. Proceedings of the Moriond EW Conference 2004
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- 2005
159. Measurement of the KL meson lifetime with the KLOE detector
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The KLOE collaboration and The KLOE collaboration
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We present a measurement of the KL lifetime using the KLOE detector. From a sample of 4 x 10^8 KS KL pairs following the reaction e+ e- -> phi -> KS KL we select 15 x 10^6 KL -> p0 p0 p0 decays tagged by KS -> pi+ pi- events. From a fit of the proper time distribution we find tau_L = (50.92 +- 0.17{stat} +- 0.25{syst})$ ns. This is the most precise measurement of the KL lifetime performed to date., Comment: 14 pages, 14 figures
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- 2005
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160. Measurements of the Absolute Branching Ratios for the Dominant KL Decays, the KL Lifetime, and Vus with the KLOE Detector
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KLOE Collaboration and KLOE Collaboration
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From a sample of about 10^9 Phi mesons produced at DAFNE, we have selected KL mesons tagged by observing KS->pi+pi- decays. We present results on the major KL branching ratios, including those of the semileptonic decays needed for the determination of Vus. These branching ratio measurements are fully inclusive with respect to final-state radiation. The KL lifetime has also been measured., Comment: Submitted to Phys. Lett. B
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- 2005
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161. The KLOE Data Acquisition System
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KLOE Collaboration
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We present in the following the design of the KLOE Data Acquisition System. Included are the philosophy and extensive discussions on all parts of the system.
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- 1995
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162. Physics with KLOE at DAPHNE
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P. Franzini and KLOE Collaboration
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Experimental measurements which can be done at DAPHNE, the ∅-factory under construction at the Laboratori Nazionali di Frascati dell'INFN, are presented. We also describe the KLOE detector, optimized for performing these measurements.
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- 1995
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163. The KLOE Central Drift Chamber (Addendum to the KLOE Technical Proposal)
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KLOE-Collaboration
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GeneralLiterature_MISCELLANEOUS - Abstract
We present in the following a design of the central tracking chamber for the KLOE detector. Included are extensive report on test results gleaned from prototype tests, experience with construction of a full length sector prototype, and detailed reports on simulation of the chamber performances.
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- 1994
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164. The KLOE Detector - Technical Proposal
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KLOE Collaboration
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- 1993
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165. KLOE a General Purpose Detector for DAFNE
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KLOE Collaboration
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- 1992
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166. Determination of η → π+π−π0Dalitz plot slopes and asymmetries with the KLOE detector
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The KLOE collaboration, F Ambrosino, A Antonelli, M Antonelli, F Archilli, C Bacci, P Beltrame, G Bencivenni, S Bertolucci, C Bini, C Bloise, S Bocchetta, F Bossi, P Branchini, R Caloi, P Campana, G Capon, T Capussela, F Ceradini, F Cesario, S Chi, G Chiefari, P Ciambrone, F Crucianelli, E. De Lucia, A. De Santis, P. De Simone, G. De Zorzi, A Denig, A. Di Domenico, C. Di Donato, B. Di Micco, A Doria, M Dreucci, G Felici, A Ferrari, M. L Ferrer, S Fiore, C Forti, P Franzini, C Gatti, P Gauzzi, S Giovannella, E Gorini, E Graziani, W Kluge, V Kulikov, F Lacava, G Lanfranchi, J Lee-Franzini, D Leone, M Martini, P Massarotti, W Mei, S Meola, S Miscetti, M Moulson, S Müller, F Murtas, M Napolitano, F Nguyen, M Palutan, E Pasqualucci, A Passeri, V Patera, F Perfetto, M Primavera, P Santangelo, G Saracino, B Sciascia, A Sciubba, A Sibidanov, T Spadaro, M Testa, L Tortora, P Valente, G Venanzoni, R Versaci, G Xu, Ambrosino, F, Antonelli, A, Antonelli, M, Archilli, F, Bacci, C, Beltrame, P, Bencivenni, G, Bertolucci, S, Bini, C, Bloise, C, Bocchetta, S, Bossi, F, Branchini, P, Caloi, R, Campana, P, Capon, G, Capussela, T, Ceradini, Filippo, Cesario, F, Chi, S, Chiefari, G, Ciambrone, P, Crucianell, F, De Lucia, E, De Santis, A, De Simone, P, De Zorzi, G, Denig, A, Di Domenico, A, Di Donato, C, DI MICCO, Biagio, Doria, A, Dreucci, M, Felici, G, Ferrari, A, Ferrer, Ml, Fiore, S, Forti, C, Franzini, P, Gatti, C, Gauzzi, P, Giovannella, S, Gorini, E, Graziani, E, Kluge, W, Kulikov, V, Lacava, F, Lanfranchi, G, Lee Franzini, J, Leone, D, Martini, M, Massarotti, P, Mei, W, Meola, S, Miscetti, S, Moulson, M, Muller, S, Murtas, F, Napolitano, M, Nguyen, F, Palutan, M, Pasqualucci, E, Passeri, A, Patera, V, Perfetto, F, Primavera, M, Santangelo, P, Saracino, G, Sciascia, B, Sciubba, A, Sibidanov, A, Spadaro, T, Testa, M, Tortora, L, Valente, P, Venanzoni, G, Versaci, R, Xu, G., Ambrosino, Fabio, Capussela, Tiziana, Chiefari, Giovanni, DI DONATO, Camilla, A., Doria, Massarotti, Paolo, Meola, Sabino, Napolitano, Marco, Perfetto, Francesco, Saracino, Giulio, Ceradini, F, DE LUCIA, E, DE SANTIS, A, DE SIMONE, P, DE ZORZI, G, DI DOMENICO, A, DI DONATO, C, DI MICCO, B, Gorini, Edoardo, LEE FRANZINI, J, and Primavera, Margherita
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Physics ,Nuclear and High Energy Physics ,Particle physics ,Luminosity (scattering theory) ,Meson ,E+-e- experiments ,Electron–positron annihilation ,Detector ,Dalitz plot ,High Energy Physics - Experiment ,Density distribution ,High Energy Physics::Experiment ,Nuclear Experiment ,Parametrization - Abstract
We have studied, with the KLOE detector at the DA$\Phi$NE $\Phi$-Factory, the dynamics of the decay $\eta\to\pi^+\pi^-\pi^0$ using $\eta$ mesons from the decay $\phi\to\eta\gamma$ for an integrated luminosity ${\mathcal L}$ = 450 pb$^{-1}$. From a fit to the Dalitz plot density distribution we obtain a precise measurement of the slope parameters. An alternative parametrization relates the $\pi^+\pi^-\pi^0$ slopes to that for $\eta\to 3\pi^0$ showing the consistency of KLOE results for both channels. We also obtain the best confirmation of the $C$-invariance in the $\eta\to\pi^+\pi^-\pi^0$ decay., Comment: 15 pages, 7 figures
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- 2008
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167. Evaluation of αμππbetween 0.35 and 0.95 GeV2with data from the KLOE Detector
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S Müller and the KLOE Collaboration
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Systematic error ,Physics ,History ,Particle physics ,Photon ,Muon ,Anomalous magnetic dipole moment ,Detector ,Computer Science Applications ,Education ,Calorimeter ,Nuclear physics ,Cross section (physics) ,High Energy Physics::Experiment ,Polar coordinate system - Abstract
The KLOE Experiment at the factory DAψNE has measured the cross section σ (e+e− → π +π −γ (γ) using two different selection criteria: requiring the photon emission at small polar angle and detecting the photon at large polar angle in the calorimeter. Using a theoretical radiator function we extract the cross section σ (e+e− → π +π −) and obtain the π contribution to the muon anomalous magnetic moment. Results presented come from the analysis of 240 pb-1 collected in 2002, with improved systematic uncertainty with respect to the published KLOE analysis.
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- 2008
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168. KLOE results on lepton flavor universality tests
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T Spadaro and the KLOE Collaboration
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Nuclear physics ,Physics ,History ,Particle physics ,High Energy Physics::Experiment ,Flavor ,Computer Science Applications ,Education ,Lepton ,Universality (dynamical systems) - Abstract
Recent KLOE measurements allowing precision tests of lepton flavor universality are here briefly described, with particular emphasis on the analysis for the ratio of branching fractions for the K ± → e± e and K± → μ±μ decays. The sensitivity of these tests, all obtained from the study of kaon decays, is compared to that from other sources.
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- 2008
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169. Vusdetermination from KLOE
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E De Lucia and the KLOE Collaboration
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Nuclear physics ,Physics ,History ,Unitarity ,Cabibbo–Kobayashi–Maskawa matrix ,Lattice (order) ,Hadron ,Momentum transfer ,Radiative transfer ,Matrix element ,Computer Science Applications ,Education - Abstract
KLOE recent experimental results on KL, Ks and K± decays relevant for the extraction of the CKM matrix element Vus are reported, including the preliminary measurement of BR(Kπ2+) presented at this conference. From a global fit using only KLOE results a value of |Vus|f+(0) = 0.21556 ± 0.00059 is obtained, where f+(0) is the form factor parametrizing the hadronic matrix element evaluated at zero momentum transfer. From the ratio of the radiative inclusive decay rates of K± → μ±ν(γ) and π± → μ±ν(γ), combined with the KLOE measurement of BR(K± → μ±ν) and the lattice calculation of the ratio of decay constants fK/fπ = 1.189(7), the value Vus/Vud = 0.2323(15) has been obtained. These results, together with Vus = 0.97372(26), are compatible at 1.5σ level with CKM matrix unitarity.
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- 2008
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170. Measurement of the K-L ->pi mu nu form factor parameters with the KLOE detector
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The KLOE collaboration, F Ambrosino, A Antonelli, M Antonelli, F Archilli, C Bacci, P Beltrame, G Bencivenni, S Bertolucci, C Bini, C Bloise, S Bocchetta, F Bossi, P Branchini, R Caloi, P Campana, G Capon, T Capussela, F Ceradini, S Chi, G Chiefari, P Ciambrone, E. De Lucia, A. De Santis, P. De Simone, G. De Zorzi, A Denig, A. Di Domenico, C. Di Donato, B. Di Micco, A Doria, M Dreucci, G Felici, A Ferrari, M. L Ferrer, S Fiore, C Forti, P Franzini, C Gatti, P Gauzzi, S Giovannella, E Gorini, E Graziani, W Kluge, V Kulikov, F Lacava, G Lanfranchi, J Lee-Franzini, D Leone, M Martini, P Massarotti, W Mei, S Meola, S Miscetti, M Moulson, S Müller, F Murtas, M Napolitano, F Nguyen, M Palutan, E Pasqualucci, A Passeri, V Patera, F Perfetto, M Primavera, P Santangelo, G Saracino, B Sciascia, A Sciubba, A Sibidanov, T Spadaro, M Testa, L Tortora, P Valente, G Venanzoni, R Versaci, G Xu, The KLOE, Collaboration, Ambrosino, Fabio, A., Antonelli, M., Antonelli, F., Archilli, C., Bacci, P., Beltrame, G., Bencivenni, S., Bertolucci, C., Bini, C., Bloise, S., Bocchetta, F., Bossi, P., Branchini, R., Caloi, P., Campana, G., Capon, Capussela, Tiziana, F., Ceradini, S., Chi, Chiefari, Giovanni, P., Ciambrone, E., De Lucia, A., De Santi, P., De Simone, G., De Zorzi, A., Denig, A., Di Domenico, C., Di Donato, B., Di Micco, A., Doria, M., Dreucci, G., Felici, A., Ferrari, M. L., Ferrer, S., Fiore, C., Forti, P., Franzini, C., Gatti, P., Gauzzi, S., Giovannella, E., Gorini, E., Graziani, W., Kluge, V., Kulikov, F., Lacava, G., Lanfranchi, J., Lee Franzini, D., Leone, M., Martini, Massarotti, Paolo, W., Mei, S., Meola, S., Miscetti, M., Moulson, S., Müller, F., Murta, Napolitano, Marco, F., Nguyen, M., Palutan, E., Pasqualucci, A., Passeri, V., Patera, F., Perfetto, M., Primavera, P., Santangelo, Saracino, Giulio, B., Sciascia, A., Sciubba, A., Sibidanov, T., Spadaro, M., Testa, L., Tortora, P., Valente, G., Venanzoni, R., Versaci, and G., Xu
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Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Particle physics ,Cabibbo–Kobayashi–Maskawa matrix ,e plus -e- experiments ,Lattice (order) ,Strong interaction ,Detector ,Lepton ,Universality (dynamical systems) - Abstract
Using 328 pb−1 of data collected at DAΦNE corresponding to ~1.8 million KL → πμν decays, we have measured the Kμ3 form factor parameters. The structure of the K−π vector-current provides information about the dynamics of the strong interaction; its knowledge is necessary for evaluation of the phase-space integral required for measuring the CKM matrix element Vus and for testing lepton universality in kaon decays. Using a new parametrization for the vector and scalar form factors, we find λ+ = (25.7 ± 0.6) × 10−3, and λ0 = (14.0 ± 2.1) × 10−3. Our result for λ0, together with recent lattice calculations of fπ, fK and f(0), satisfies the Callan-Treiman relation.
171. Measurement of the absolute branching ratios for semileptonic K+/- decays with the KLOE detector
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Ambrosino, F., Antonelli, A., Antonelli, M., Archilli, F., Bacci, C., Beltrame, P., Bencivenni, G., Bertolucci, S., Bini, C., Bloise, C., Bocchetta, S., Bossi, F., Branchini, P., Caloi, R., Campana, P., Capon, G., Capussela, T., Ceradini, F., Chi, S., Chiefari, G., Ciambrone, P., Lucia, E., Antonio De Santis, Simone, P., Zorzi, G., Denig, A., Di Domenico, A., Di Donato, C., Di Micco, B., Doria, A., Dreucci, M., Felici, G., Ferrari, A., Ferrer, M. L., Fiore, S., Forti, C., Franzini, P., Gatti, C., Gauzzi, P., Giovannella, S., Gorini, E., Graziani, E., Kluge, W., Kulikov, V., Lacava, F., Lanfranchi, G., Lee-Franzini, J., Leone, D., Martini, M., Massarotti, P., Mei, W., Meola, S., Miscetti, S., Moulson, M., Muller, S., Murtas, F., Napolitano, M., Nguyen, F., Palutan, M., Pasqualucci, E., Passeri, A., Patera, V., Perfetto, F., Primavera, M., Santangelo, P., Saracino, G., Sciascia, B., Sciubba, A., Sibidanov, A., Spadaro, T., Testa, M., Tortora, L., Valente, P., Venanzoni, G., Versaci, R., Xu, G., and Kloe, Collaboration
172. The eta -> eta(0)gamma gamma decay, the eta/eta ' mixing angle and the eta mass measurement at KLOE
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Di Micco, B., Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Beltrame, P., Bencivenni, G., Bertolucci, S., Bini, C., Bloise, C., Bocci, V., Bossi, F., Bowring, D., Branchini, P., Caloi, R., Campana, P., Capon, G., Capussela, T., Ceradini, F., Chi, S., Chiefari, G., Ciambrone, P., Conetti, S., Lucia, E., Simone, P., Zorzi, G., Agnello, S., Denig, A., Antonio Di Domenico, Di Donato, C., Di Falco, S., Doria, A., Dreucci, M., Felici, G., Ferrari, A., Ferrer, M. L., Finocchiaro, G., Forti, C., Franzini, P., Gatti, C., Gauzzi, P., Giovannella, S., Gorini, E., Graziani, E., Incagli, M., Kluge, W., Kulikov, V., Lacava, F., Lanfranchi, G., Lee-Franzini, J., Leone, D., Martini, M., Massarotti, P., Mei, W., Meola, S., Miscetti, S., Moulson, M., Mueller, S., Murtas, F., Napolitano, M., Nguyen, F., Palutan, M., Pasqualucci, E., Passeri, A., Patera, V., Perfetto, F., Pontecorvo, L., Primavera, M., Santangelo, P., Santovetti, E., Saracino, G., Sciascia, B., Sciubba, A., Scuri, F., Sfiligoi, I., Spadaro, T., Testa, M., Tortora, L., Valente, P., Valeriani, B., Venanzoni, G., Veneziano, S., Ventura, A., Versaci, R., Xu, G., and Kloe collaboration
173. Experiments at the DA Phi NE phi-factory
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Aloisio, A., Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Bencivenni, G., Bertolucci, S., Bini, C., Bloise, C., Bocci, V., Bossi, F., Branchini, P., Bulychjov, Sa, Cabibbo, G., Caloi, R., Campana, P., Capon, G., Massimo Casarsa, Casavola, V., Cataldi, G., Ceradini, F., Cervelli, F., Cevenini, F., Chiefari, G., Ciambrone, P., Conetti, S., Lucia, E., Robertis, G., Simone, P., Zorzi, G., Agnello, S., Denig, A., Di Domenico, A., Di Donato, C., Di Falco, S., Doria, A., Dreucci, M., Erriquez, O., Farilla, A., Felici, G., Ferrari, A., Ferrer, Ml, Finocchiaro, G., Forti, C., Franceschi, A., Franzini, P., Gatti, C., Gauzzi, P., Giovannella, S., Gorini, E., Grancagnolo, F., Graziani, E., Han, Sw, Incagli, M., Ingrosso, L., Kluge, W., Kuo, C., Kulikov, V., Lacava, F., Lanfranchi, G., Lee-Franzini, J., Leone, D., Lu, P., Martemianov, M., Matsyuk, M., Mei, W., Merola, L., Messi, R., Miscetti, S., Moulson, M., Mueller, S., Murtas, F., Napolitano, M., Nedosekin, A., Nguyen, F., Palutan, M., Paoluzi, L., Pasqualucci, E., Passalacqua, L., Passeri, A., Patera, V., Petrolo, E., Pontecorvo, L., Primavera, M., Ruggieri, F., Santangelo, P., Santovetti, E., Saracino, G., Schamberger, Rd, Sciascia, B., Sciubba, A., Scuri, F., Sfiligoi, I., Spadaro, T., Spiriti, E., Tong, Gl, Tortora, L., Valente, E., Valente, P., Valeriani, B., Venanzoni, G., Veneziano, S., Ventura, A., Xu, G., Yu, Gw, and Kloe, Collaboration
174. KID-KLOE integrated dataflow
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Adinolfi, M., Aloisio, A., Ambrosino, F., Andryakov, A., Antonelli, A., Antonelli, M., Anulli, F., Bacci, C., Barbiellini, G., Bellini, F., Bencivenni, G., Bertolucci, S., Bini, C., Bloise, C., Bocci, V., Bossi, F., Branchini, P., Bulychjov, Sa, Cabibbo, G., Calcaterra, A., Caloi, R., Campana, P., Capon, G., Carboni, G., Cardini, A., Casarsa, M., Cataldi, G., Ceradini, F., Cervelli, F., Cevenini, F., Chiefari, G., Ciambrone, P., Conetti, S., Conticelli, S., Lucia, E., Robertis, G., Sangro, R., Simone, P., Zorzi, G., Agnello, S., Denig, A., Di Domenico, A., Di Falco, S., Doria, A., Drago, E., Erriquez, O., Farilla, A., Ferlici, G., Ferrari, A., Ferrer, Ml, Finocchiaro, G., Forti, C., Franceschi, A., Franzini, P., Gao, Ml, Gatti, C., Gauzzi, P., Giovannella, S., Golovatyuk, V., Gorini, E., Grancagnolo, F., Grandegger, W., Graziani, E., Guarnaccia, P., Han, Hg, Han, Sw, Huang, X., Incagli, M., Ingrosso, L., Jiang, Yy, Kim, W., Kluge, W., Kulikov, V., Lacava, F., Lanfranchi, G., Lee-Franzini, J., Lomtadze, T., Luisi, C., Mao, Cs, Martemianov, M., Martini, A., Matsyuk, M., Mei, W., Merola, L., Messi, R., Miscetti, S., Moalem, A., Moccia, S., Moulson, M., Mueller, S., Murtas, F., Napolitano, M., Nedosekin, A., Panareo, M., Pacciani, L., Pages, P., Palutan, M., Paoluzi, L., Pasqualucci, E., Passalacqua, L., Passaseo, M., Passeri, A., Patera, V., Petrolo, E., Petrucci, G., Picca, D., Pirozzi, G., Ciro Pistillo, Pollack, M., Pontecorvo, L., Primavera, M., Ruggieri, F., Santangelo, P., Santovetti, E., Saracino, G., Schamberger, Rd, Schwick, C., Sciascia, B., Sciubba, A., Scuri, F., Sfiligoi, I., Shan, J., Spadaro, T., Spagnolo, S., Spiriti, E., Stanescu, C., Tong, Gl, Tortora, L., Valente, E., Valente, P., Valeriani, B., Venanzoni, G., Veneziano, S., Wu, Y., Xie, Yg, Zhao, Pp, Zhou, Y., and Kloe, Collaboration
175. Measurement of $\Gamma(\eta \to \pi^+\pi^-\gamma)/\Gamma(\eta \to \pi^+\pi^-\pi^0)$ with KLOE experiment
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The KLOE Collaboration, Ambrosino, F., Antonelli, A., Antonelli, M., Archilli, F., Balwierz, I., Bencivenni, G., Bini, C., Bloise, C., Bocchetta, S., Bossi, F., Branchini, P., Capon, G., Capussela, T., Ceradini, F., Ciambrone, P., Czerwiski, E., De Lucia, E., De Santis, A., De Simone, P., De Zorzi, G., Denig, A., Di Domenico, A., Di Donato, C., Di Micco, B., Dreucci, M., Felici, G., Fiore, S., Franzini, P., Gatti, C., Gauzzi, P., Giovannella, S., Graziani, E., Jacewicz, M., Lee-Franzini, J., Martemianov, M., Martini, M., Massarotti, P., Meola, S., Miscetti, S., Morello, G., Moulson, M., Muller, S., Napolitano, M., Nguyen, F., Palutan, M., Passeri, A., Patera, V., Longhi, I. Prado, Santangelo, P., Sciascia, B., Silarski, M., Spadaro, T., Taccini, C., Tortora, L., Venanzoni, G., Versaci, R., Xu, G., Zdebik, J., collaboration, as members of the KLOE-2, Babusci, D., Badoni, D., Bocci, V., Budano, A., Bulychjev, S. A., Campana, P., Dané, E., De Robertis, G., Domenici, D., Erriquez, O., Fanizzi, G., Gonnella, F., Happacher, F., Höistad, B., Iarocci, E., Johansson, T., Kulikov, V., Kupsc, A., Loddo, F., Matsyuk, M., Messi, R., Moricciani, D., Moskal, P., Ranieri, A., Sarra, I., Schioppa, M., Sciubba, A., Wiślicki, W., and Wolke, M.
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Astrophysics::High Energy Astrophysical Phenomena ,High Energy Physics::Experiment ,Nuclear Experiment ,Particle Physics - Experiment ,High Energy Physics - Experiment - Abstract
We report the measurement of the ratio $\Gamma(\eta \to \pi^+\pi^-\gamma)/\Gamma(\eta \to \pi^+\pi^-\pi^0)$ analyzing a large sample of $\phi \to \eta \gamma$ decays recorded with the KLOE experiment at the DA$\Phi$NE $e^+ e^-$ collider, corresponding to an integrated luminosity of 558 pb$^{-1}$. The $\eta \to \pi^+\pi^-\gamma$ process is supposed to proceed both via a resonant contribution, mediated by the $\rho$ meson, and a non resonant direct term, connected to the box anomaly. The presence of the direct term affects the partial width value. Our result $R_{\eta}=\Gamma(\eta \to \pi^+ \pi^- \gamma)/\Gamma(\eta \to \pi^+ \pi^- \pi^0)= 0.1838\pm 0.0005_{stat} \pm 0.0030_{syst}$ is in agreement with a recent CLEO measurement, which differs by more 3 $\sigma$ from the average of previous results. We report the measurement of the ratio $\Gamma(\eta \to \pi^+\pi^-\gamma)/\Gamma(\eta \to \pi^+\pi^-\pi^0)$ analyzing a large sample of $\phi \to \eta \gamma$ decays recorded with the KLOE experiment at the DA$\Phi$NE $e^+ e^-$ collider, corresponding to an integrated luminosity of 558 pb$^{-1}$. The $\eta \to \pi^+\pi^-\gamma$ process is supposed to proceed both via a resonant contribution, mediated by the $\rho$ meson, and a non resonant direct term, connected to the box anomaly. The presence of the direct term affects the partial width value. Our result $R_{\eta}=\Gamma(\eta \to \pi^+ \pi^- \gamma)/\Gamma(\eta \to \pi^+ \pi^- \pi^0)= 0.1838\pm 0.0005_{stat} \pm 0.0030_{syst}$ is in agreement with a recent CLEO measurement, which differs by more 3 $\sigma$ from the average of previous results.
176. Measurement of Gamma(K-S ->pi(+)pi(-)(gamma))/Gamma(K-S ->pi(0)pi(0))
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Aloisio, A., Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Baldini-Ferroli, R., Bencivenni, G., Bertolucci, S., Bini, C., Bloise, C., Bocci, V., Bossi, F., Branchini, P., Bulychjov, S. A., Cabibbo, G., Caloi, R., Campana, P., Capon, G., Carboni, G., Casarsa, M., Casavola, V., Cataldi, G., Ceradini, F., Cervelli, F., Cevenini, F., Chiefari, G., Ciambrone, P., Conetti, S., Lucia, E., Robertis, G., Simone, P., Zorzi, G., Agnello, S., Denig, A., Antonio Di Domenico, Di Donato, C., Di Falco, S., Doria, A., Dreucci, M., Erriquez, O., Farilla, A., Felici, G., Ferrari, A., Ferrer, M. L., Finocchiaro, G., Forti, C., Franceschi, A., Franzini, P., Gatti, C., Gauzzi, P., Giovannella, S., Gorini, E., Grancagnolo, F., Graziani, E., Han, S. W., Incagli, M., Ingrosso, L., Kluge, W., Kuo, C., Kulikov, V., Lacava, F., Lanfranchi, G., Lee-Franzini, J., Leone, D., Lu, F., Martemianov, M., Matsyuk, M., Mei, W., Merola, L., Messi, R., Miscetti, S., Moulson, M., Muller, S., Murtas, F., Napolitano, M., Nedosekin, A., Nguyen, F., Palutan, M., Paoluzi, L., Pasqualucci, E., Passalacqua, L., Passeri, A., Patera, V., Petrolo, E., Pirozzi, G., Pontecorvo, L., Primavera, M., Ruggieri, F., Santangelo, P., Santovetti, E., Saracino, G., Schamberger, R. D., Sciascia, B., Sciubba, A., Scuri, F., Sfiligoi, I., Spadaro, T., Spiriti, E., Tong, G. L., Tortora, L., Valente, E., Valente, P., Valeriani, B., Venanzoni, G., Veneziano, S., Ventura, A., Xu, Y., Yu, Y., and Kloe Collaboration
177. Measurement of the charged kaon lifetime with the KLOE detector
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The KLOE collaboration, F Ambrosino, A Antonelli, M Antonelli, F Archilli, C Bacci, P Beltrame, G Bencivenni, S Bertolucci, C Bini, C Bloise, S Bocchetta, F Bossi, P Branchini, R Caloi, P Campana, G Capon, T Capussela, F Ceradini, S Chi, G Chiefari, P Ciambrone, E. De Lucia, A. De Santis, P. De Simone, G. De Zorzi, A Denig, A. Di Domenico, C. Di Donato, B. Di Micco, A Doria, M Dreucci, G Felici, A Ferrari, M.L Ferrer, S Fiore, C Forti, P Franzini, C Gatti, P Gauzzi, S Giovannella, E Gorini, E Graziani, W Kluge, V Kulikov, F Lacava, G Lanfranchi, J Lee-Franzini, D Leone, M Martini, P Massarotti, W Mei, S Meola, S Miscetti, M Moulson, S Müller, F Murtas, M Napolitano, F Nguyen, M Palutan, E Pasqualucci, A Passeri, V Patera, F Perfetto, M Primavera, P Santangelo, G Saracino, B Sciascia, A Sciubba, A Sibidanov, T Spadaro, M Testa, L Tortora, P Valente, G Venanzoni, R Versaci, G Xu, Ambrosino, F, Antonelli, A, Antonelli, M, Archilli, F, Bacci, C, Beltrame, P, Bencivenni, G, Bertolucci, S, Bini, C, Bloise, C, Bocchetta, S, Bossi, F, Branchini, P, Caloi, R, Campana, P, Capon, G, Capussela, T, Ceradini, F, Chi, S, Chiefari, G, Ciambrone, P, DE LUCIA, E, DE SANTIS, A, DE SIMONE, P, DE ZORZI, G, Denig, A, DI DOMENICO, A, DI DONATO, C, DI MICCO, B, Doria, A, Dreucci, M, Felici, G, Ferrari, A, Ferrer, Ml, Fiore, S, Forti, C, Franzini, P, Gatti, C, Gauzzi, P, Giovannella, S, Gorini, Edoardo, Graziani, E, Kluge, W, Kulikov, V, Lacava, F, Lanfranchi, G, LEE FRANZINI, J, Leone, D, Martini, M, Massarotti, P, Mei, W, Meola, S, Miscetti, S, Moulson, M, Muller, S, Murtas, F, Napolitano, M, Nguyen, F, Palutan, M, Pasqualucci, E, Passeri, A, Patera, V, Perfetto, F, Primavera, Margherita, Santangelo, P, Saracino, G, Sciascia, B, Sciubba, A, Sibidanov, A, Spadaro, T, Testa, M, Tortora, L, Valente, P, Venanzonia, G, Versaci, R, Xu, G., Ambrosino, Fabio, Massarotti, Paolo, S., Meola, Napolitano, Marco, F., Perfetto, C., Di Donato, Saracino, Giulio, and DI MICCO, Biagio
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Physics ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,Nuclear and High Energy Physics ,Decay time ,Particle physics ,Decay length ,Detector ,FOS: Physical sciences ,CP violation ,High Energy Physics::Experiment ,e plus -e- experiments ,e+-e- experiments ,High Energy Physics - Experiment - Abstract
We have measured the charged kaon lifetime using a sample of 15 \times 10^6 tagged kaon decays. Charged kaons were produced in pairs at the DA\PhiNE \phi-factory, e^+e^- \to \phi \to K^+ K^-. The decay of a K^+ was tagged by the production of a K^- and viceversa. The lifetime was obtained, for both charges, from independent measurements of the decay time and decay lenght distributions. From fits to the four distributions we find \tau = (12.347\pm0.030) ns., Comment: 13 pages, 14 figures
178. KLOE results on scalar and pseudoscalar mesons.
- Author
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Gauzzi, P. and Xu, KLOE collaborationThe KLOE collaboration: F. Ambrosino, A. Antonelli, M. Antonelli, F. Archilli, P. Beltrame, G. Bencivenni, S. Bertolucci, C. Bini, C. Bloise, S. Bocchetta, F. Bossi, P. Branchini, G. Capon, T. Capussela, F. Ceradini, P. Ciambrone, E. De
- Published
- 2010
- Full Text
- View/download PDF
179. Search for CPT violation and decoherence effects in the neutral kaon system
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Ambrosino, F., Antonelli, A., Antonelli, M., Archilli, F., Beltrame, P., Bencivenni, G., Bertolucci, S., Bini, Cesare, Bloise, C., Bocchetta, S., Bossi, F., Branchini, P., Capon, G., Capriotti, D., Capussela, T., Ceradini, F., Ciambrone, P., De Lucia, E., DE SANTIS, Antonio, De Simone, P., DE ZORZI, Guido, Denig, A., DI DOMENICO, Antonio, Di Donato, C., Di Micco, B., Dreucci, M., Felici, G., Fiore, Salvatore, Franzini, Paolo, Gatti, C., Gauzzi, Paolo, Giovannella, S., Graziani, E., Kulikov, V., Lanfranchi, G., Lee Franzini, J., Martini, M., Massarotti, P., Meola, S., Miscetti, S., Moulson, M., Mu Ller, S., Murtas, F., Napolitano, M., Nguyen, F., Palutan, M., Pasqualucci, E., Passeri, A., Patera, Vincenzo, Santangelo, P., Sciascia, B., Sibidanov, A., Spadaro, T., Testa, M., Tortora, L., Valente, P., Venanzoni, G., Versaci, R., Ambrosino, Fabio, DI DONATO, Camilla, Massarotti, Paolo, Napolitano, Marco, and Kloe, Collaboration
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Physics ,History ,Particle physics ,Quantum decoherence ,Planck scale ,CPT symmetry ,Computer Science Applications ,Education ,law.invention ,symbols.namesake ,Physics and Astronomy (all) ,T-symmetry ,law ,symbols ,Quantum gravity ,High Energy Physics::Experiment ,Collider - Abstract
The neutral kaon system offers a unique possibility to perform fundamental tests of CPT invariance, as well as of the basic principles of quantum mechanics. The most recent limits on several kinds of possible CPT violation and decoherence mechanisms, which in some cases might be justified in a quantum gravity framework, are reviewed, including the latest results obtained by the KLOE experiment at the DAΦNE e+e- collider. No deviation from the expectations of quantum mechanics and CPT symmetry is observed, while the precision of the measurements, in some cases, reaches the interesting Planck scale region.
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- 2009
180. Highlights on Hadronic Physics at KLOE
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Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Beltrame, P., Bencivenni, G., Bertolucci, S., Bini, C., Bloise, C., Bocchetta, S., Bocci, V., Bossi, F., Bowring, D., Branchini, P., Caloi, R., Campana, P., Capon, G., Capussela, T., Ceradini, F., Chi, S., Chiefari, G., Ciambrone, P., Conetti, S., Lucia, E., Santis, A., Simone, P., Zorzi, G., Agnello, S., Denig, A., Di Domenico, A., Di Donato, C., Di Falco, S., Di Micco, B., Doria, A., Dreucci, M., Felici, G., Anna Ferrari, FERRER ML, Finocchiaro, G., Fiore, S., Forti, C., Franzini, P., Gatti, C., Gauzzi, P., Giovannella, S., Gorini, E., Graziam, E., Incagli, M., Kluge, W., Kulikov, V., Lacava, F., Lanfranchi, G., Lee-Franzini, J., Leone, D., Martini, M., Massarotti, P., Mei, W., Meola, S., Miscetti, S., Moulson, M., Maller, S., Murtas, F., Napolitano, M., Nguyen, F., Palutan, M., Pasqualucci, E., Passeri, A., Patera, V., Perfetto, F., Pontecorvo, L., Primavera, M., Santangelo, P., Samovetti, E., Saracino, G., Sciascia, B., Sciubba, A., Scuri, F., Sfiligoi, I., Spadaro, T., Testa, M., Tortora, L., Valente, P., Valeriani, B., Venanzoni, G., Veneziano, S., Ventura, A., Versaci, R., Xu, G., S., Giovannella, Gorini, Edoardo, Primavera, Margherita, Ventura, Andrea, and Kloe, Collaboration
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Physics ,Particle physics ,Meson ,φ radiative decays ,Pseudoscalar mesons ,Scalar mesons ,Hadron ,Dalitz plot ,Weinberg angle ,Gluon ,Nuclear physics ,Pseudoscalar ,pi K and eta mesons ,Invariant mass ,Center of mass ,KLOE Hadron ,Decays of other meson - Abstract
The KLOE experiment has just collected 2.5 fb−1 of e + e − collisions at center of mass energy around the φ mass. Radiative decays are used to produce large statistical samples of light scala and pseudoscalar mesons. The analysis of the first 450 pb−1 is almost completed. For the scala sector we have investigated the properties of these particles by studying their invariant mass shapes or the event density in the Dalitz plot. With the same data set, the η mass and the ratio BR(φ → η′γ)/BR(φ → ηγ) have been measured. From this last quantity we extract the most precise determination of the η/η′ mixing angle, which is strictly related to the η′ gluon content.
- Published
- 2006
- Full Text
- View/download PDF
181. Meson decay studies with the KLOE detector at DAΦNE
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ALOISIO, ALBERTO, AMBROSINO, FABIO, CAPUSSELA, TIZIANA, CHIEFARI, GIOVANNI, MEROLA, LEONARDO, NAPOLITANO, MARCO, PERFETTO, FRANCESCO, SARACINO, GIULIO, A. Antonelli, M. Antonelli, C. Bacci, F. Bellini, G. Bencivenni, S. Bertolucci, C. Bini, C. Bloise, V. Bocci, F. Bossi, P. Branchini, S. A. Bulychjov, G. Cabibbo, R. Caloi, P. Campana, G. Capon, G. Carboni, M. Casarsa, V. Casavola, G. Cataldi, F. Ceradini, F. Cervelli, F. Cevenini, P. Ciambrone, S. Conetti, E. D. Lucia, G. D. Robertis, P. D. Simone, G. D. Zorzi, S. Dell'Agnello, A. Denig, A. D. Domenico, C. D. Donato, S. D. Falco, B. D. Micco, A. Doria, M. Dreucci, O. Erriquez, A. Farilla, G. Felici, A. Ferrari, M. L. Ferrer, G. Finocchiaro, C. Forti, A. Franceschi, P. Franzini, C. Gatti, P. Gauzzi, S. Giovannella, E. Gorini, F. Grancagnolo, E. Graziani, S. W. Han, M. Incagli, L. Ingrosso, W. Kluge, C. Kuo, V. Kulikov, F. Lacava, G. Lanfranchi, J. Lee Franzini, D. Leone, F. Lu, M. Martemianov, M. Matsyuk, W. Mei, R. Messi, S. Miscetti, M. Moulson, S. Muller, F. Murtas, A. Nedosekin, F. Nguyen, M. Palutan, E. Pasqualucci, L. Passalacqua, A. Passeri, V. Patera, E. Petrolo, G. Pirozzi, L. Pontecorvo, M. Primavera, F. Ruggieri, P. Santangelo, E. Santovetti, R. D. Schamberger, B. Sciascia, A. Sciubba, F. Scuri, I. Sfiligoi, A. Sibidanov, P. Silano, T. Spadaro, E. Spiriti, G. L. Tong, L. Tortora, E. Valente, P. Valente, B. Valeriani, G. Venanzoni, S. Veneziano, A. Ventura, S. Ventura, R. Versaci, Y. Xu, G. W. Yu, Aloisio, Alberto, Ambrosino, Fabio, A., Antonelli, M., Antonelli, C., Bacci, F., Bellini, G., Bencivenni, S., Bertolucci, C., Bini, C., Bloise, V., Bocci, F., Bossi, P., Branchini, S. A., Bulychjov, G., Cabibbo, R., Caloi, P., Campana, G., Capon, Capussela, Tiziana, G., Carboni, M., Casarsa, V., Casavola, G., Cataldi, F., Ceradini, F., Cervelli, F., Cevenini, Chiefari, Giovanni, P., Ciambrone, S., Conetti, E. D., Lucia, G. D., Roberti, P. D., Simone, G. D., Zorzi, S., Dell'Agnello, A., Denig, A. D., Domenico, C. D., Donato, S. D., Falco, B. D., Micco, A., Doria, M., Dreucci, O., Erriquez, A., Farilla, G., Felici, A., Ferrari, M. L., Ferrer, G., Finocchiaro, C., Forti, A., Franceschi, P., Franzini, C., Gatti, P., Gauzzi, S., Giovannella, E., Gorini, F., Grancagnolo, E., Graziani, S. W., Han, M., Incagli, L., Ingrosso, W., Kluge, C., Kuo, V., Kulikov, F., Lacava, G., Lanfranchi, J., Lee Franzini, D., Leone, F., Lu, M., Martemianov, M., Matsyuk, W., Mei, Merola, Leonardo, R., Messi, S., Miscetti, M., Moulson, S., Muller, F., Murta, Napolitano, Marco, A., Nedosekin, F., Nguyen, M., Palutan, E., Pasqualucci, L., Passalacqua, A., Passeri, V., Patera, Perfetto, Francesco, E., Petrolo, G., Pirozzi, L., Pontecorvo, M., Primavera, F., Ruggieri, P., Santangelo, E., Santovetti, Saracino, Giulio, R. D., Schamberger, B., Sciascia, A., Sciubba, F., Scuri, I., Sfiligoi, A., Sibidanov, P., Silano, T., Spadaro, E., Spiriti, G. L., Tong, L., Tortora, E., Valente, P., Valente, B., Valeriani, G., Venanzoni, S., Veneziano, A., Ventura, S., Ventura, R., Versaci, Y., Xu, G. W., Yu, Gorini, Edoardo, Primavera, Margherita, Ventura, Andrea, Kloe, Collaboration, and DI MICCO, Biagio
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Physics ,Nuclear and High Energy Physics ,Particle physics ,Meson ,Detector ,law.invention ,meson physic ,Nuclear physics ,law ,KLOE ,Radiative transfer ,Collider ,KLOE Mesons ,DAPhine - Abstract
The KLOE experiment has been collecting data since april 1999 at the DAΦNE collider in Frascati. A statistics of about 0.45 f b −1 has been analyzed. The latest results concerning the study of the ϕ radiative decays and of the kaon decays are illustrated in this paper.
- Published
- 2005
182. Rare phi decays
- Author
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Vincenzo PATERA, Sergio Bertolucci, Stefano Veneziano, Paolo Gauzzi, Roberto Versaci, Paolo Branchini, Camilla Di Donato, Paolo Valente, Federico Ruggieri, Andrea Ventura, Fabrizio Murtas, Simona Giovannella, Gorini, Edoardo, Primavera, Margherita, Ventura, Andrea, and Kloe, Collaboration
- Subjects
Pseudoscalar ,Nuclear physics ,Physics ,Particle physics ,Physics and Astronomy (miscellaneous) ,Meson ,KLOE, Phi meson ,Radiative transfer ,Invariant mass ,High Energy Physics::Experiment ,Nuclear Experiment ,Engineering (miscellaneous) ,Gluon - Abstract
The Kloe experiment has collected an integrated luminosity ~ 500 pb–1 up to now, which means ~ 1.65×109 φ decays. The huge amount of events allowed us to measure rare φ decays. We measured the radiative decays of the φ meson into π0, η and η′(958). These measurements are relevant to assess the mixing in the pseudoscalar nonet as well as to evaluate the gluon content in the η′(958). Moreover also the radiative decays into π0 π0 γ and η π0 γ have been measured. These decays are dominated by the final states f0(980) and a0(980). The measurement of the branching ratios and of the π0 π0 or η π0 invariant mass spectrum helps to understand the controversial nature of the above scalar mesons. PACS: PACS-key e+ e– collisions – PACS-key φ radiative decays
- Published
- 2004
183. Vusand CP violation from kaon decays with the KLOE detector
- Author
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Paolo Gauzzi, Erika De Lucia, Paolo Valente, Antonio De Santis, Barbara Sciascia, Ambrosino, Fabio, DI DONATO, Camilla, Massarotti, Paolo, Napolitano, Marco, and Kloe, Collaboration
- Subjects
Physics ,History ,Particle physics ,Unitarity ,CPT symmetry ,Branching fraction ,Cabibbo–Kobayashi–Maskawa matrix ,High Energy Physics::Phenomenology ,Scalar (mathematics) ,Detector ,Computer Science Applications ,Education ,Nuclear physics ,Physics and Astronomy (all) ,CP violation ,High Energy Physics::Experiment - Abstract
The KLOE experiment has provided precise measurements of the branching ratio of the main neutral and charged kaon decay modes, of the Kl and the K± lifetimes, and of the Kl vector and scalar form factors. We present a description of the above measurements and an overall fit of all our data, with particular attention to correlations. These data provide the basis for the determination of the value of the CKM matrix element Vus and a test of the unitarity of the quark mixing matrix. In addition our first measurement of the charge asimmetry in KS semileptonic decays, AS, gaves us the possibility to contribute to the knowledge of () and testing the CPT symmetry through the Bell Steinberger relation.
- Published
- 2009
- Full Text
- View/download PDF
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